ENDOGENIC CLASTITES AND THEIR ROLE IN THE FORMATION OF PETROLEUM POOLS IN THE SOUTHERN SIBERIAN CRATON

Abstract

We studied endogenic clastites in the course of documentation of deep oil- and gas-prospecting boreholes during tunneling in the Baikal, Kodar, Northern Muya areas and in basal members of the sedimentary cover of the Siberian Craton. In these areas, clastic rocks resemble, at first sight, usual terrigenous sedimentary rocks, but they have undoubtedly different genesis. Their origin is related to complex mechanochemical transformations due to fracturing, grinding, rolling, and recrystallization of separate minerals in primary rocks with subsequent intense circulation of aggressive waters and deep fluids along tectonically weakened zones.